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Gwar [14]
2 years ago
12

Solve by elimination 5x-y=12 3x+2y=2

Mathematics
2 answers:
Ber [7]2 years ago
7 0
(2)5x-y=12
   3x+2y=2
10x-2y=12
 3x+2y=2
13x=2
x=0.15
Ket [755]2 years ago
7 0
Eliminate y
time first equation by 2 an add them together


10x-2y=24
<u>3x+2y=2 +</u>
13x+0y=26

13x=26
divide both sides by 13
x=2

sub back

3x+2y=2
3(2)+2y=2
6+2y=2
minus 6
2y=-4
divide 2
y=-2

(x,y)
(2,-2)
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Part A: You have $0.80 in your backpack in dimes and quarters. Let x represent the number of dimes and y represent the number of
Alik [6]
Part A: 0.10x + 0.25 = 0.80 (dimes are 10 cents or 0.10 dollars, quarters are 0.25 dollars)
Part B: Plug in what you DO know and solve the one you DON’T:
0.10x + 0.25(2) = 0.80
0.10x + 0.50 = 0.80. Subtract 0.50 from both sides:
0.10x = 0.30 (Divide both sides by 0.10)
x = 3
Therefore you have 3 dimes
8 0
3 years ago
Show the number on a number line:<br> -12 ÷ 4 =
Gwar [14]

Answer:

well if we take -12 and divide it by four we will get -3.

Step-by-step explanation:

If we have a total of negative 12, just divide it by 4 and the difference between each division is the sum.

Your answer will be -3 on the number line.

:)

3 0
2 years ago
Read 2 more answers
Find the slope of the line (-1,-4) , (-4,2)
Feliz [49]
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4 0
2 years ago
1. Solve (50 Points) 17 of 2 를 Enter your math answer 2. In a cookie jar, 1/4 of the cookies are chocolate chip, and 1/2 of the
prohojiy [21]

Answer:

3/8

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7 0
3 years ago
Read 2 more answers
F(x) = x ^ 2 - 8x + 7
bekas [8.4K]
Answer:
They have the same x-value
f(x) has the greater minimum
Step-by-step explanation:
To find the vertex of a second degree equation, in this case the minimum value, we can use the following equation:
x = -b / 2a
Remember that a second degree equation has the following form:
ax^2 + bx + c
so a = 1, b = -8 and c = 7. Now you have to substitute in the previous equation
x = - (-8) / 2(1)
x = 8 / 2
x = 4
This means that the two functions have the same x-value.
The y value of f(x) would be
f(4) = (4)^2 - 8(4) + 7
f(4) = 16 - 32 + 7
f(4) = -9
So the vertex, or minimun value of f(x) would be at the point (4, -9).
The vertex, or minimun value of g(x) is at the point (4, -4).
So f(x) has a minimum value of -9 and g(x) a minimum value of -4.
5 0
2 years ago
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